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A ______ is something that could be a danger.
Substances that attack metals, stonework and skin are called _________.
Something that has a large amount of substance in it and very little water is ____________.
To ______ is to make a liquid weaker or thinner by adding more liquid, often water.
An ________ is something that irritates the skin and eyes.
A substance that turns litmus red and has a PH of less than 7 is called an ____.
A substance that turns litmus blue and has a PH of more than 7 is called an ______.
________ is when foods are perserved by keeping them in vinegar.